Rugby union, rugby league, cycling, soccer and AFL (aussie rules) if head injuries ae present, Ice Hockey, and NFL
Feud:
Football
Hockey
Biking
Car Racing
That depends on your age and where you're at. Helmet laws differ from place to place. Some places require all people to wear a helmet, other require people under a certain age to wear a helmet, some don't require bicyclists of any age to wear a helmet at all.
State-by-state guide to motorcycle helmet laws http://news.consumerreports.org/cars/2011/06/state-by-state-guide-to-motorcycle-helmet-laws.html yes
All that require it
that depends on what type of exercise you are performing. Differant exercises require differant times & burn differant calories
You are not required by law to wear a crash helmet in Florida however i would highly recommend that you do! Florida does not require a helmet while driving a motorcycle. http://www.edgarsnyder.com/auto-accident/motorcycle-accident/helmetlaws/florida.html
A climbing helmet offers better protection for outdoor activities compared to a bike helmet.
By dot helmet do you mean a Department of Transportation approved type ?
Do you require anything before I leave? This will require the use of a screwdriver and pliers.
It depends on where your riding. Some places don't require you to wear a helmet. If it is required the actual price of a ticket would vary.
The states that do not require any sort of helmet protection are Colorado, Illinois, Iowa, and New Hampshire. AR, FL, KY, PA, RI, SC and TX only require helmets for riders 18-21.
It will depend greatly on the type of exercise you are referring to. If you are at the gym doing heavy squats, trail running, doing pilates or at a bootcamp, you will require different shoes.
NASSS